Question

What is armature. And which rule is known as Dynamo rule

Answer 1

the rotating coils of electric motor .


Fleming's left hand rule

Answer 2

Fleming’s left hand rule is used to determine the direction of motion of a motor. It states that if the first three fingers of the right hand are held mutually perpendicular to each other, with the index finger in the direction of magnetic flux and the middle finger in the direction of electric current, the thumb points to the direction of the motion of the motor.
Structure: A bicycle dynamo consists of a permanent magnet and a coil of insulated copper wire wound on a laminated soft iron core. The coil is kept in the magnetic field of a magnet. The magnet is connected with the cup or head of the dynamo with an axle.